lisp/org-habit.el

   1 ;;; org-habit.el --- The habit tracking code for Org-mode
   2
   3 ;; Copyright (C) 2009
   4 ;;   Free Software Foundation, Inc.
   5
   6 ;; Author: John Wiegley <johnw at gnu dot org>
   7 ;; Keywords: outlines, hypermedia, calendar, wp
   8 ;; Homepage: http://orgmode.org
   9 ;; Version: 6.32trans
  10 ;;
  11 ;; This file is part of GNU Emacs.
  12 ;;
  13 ;; GNU Emacs is free software: you can redistribute it and/or modify
  14 ;; it under the terms of the GNU General Public License as published by
  15 ;; the Free Software Foundation, either version 3 of the License, or
  16 ;; (at your option) any later version.
  17
  18 ;; GNU Emacs is distributed in the hope that it will be useful,
  19 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
  20 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  21 ;; GNU General Public License for more details.
  22
  23 ;; You should have received a copy of the GNU General Public License
  24 ;; along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.
  25 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
  26 ;;
  27 ;;; Commentary:
  28
  29 ;; This file contains the habit tracking code for Org-mode
  30
  31 (require 'org)
  32 (require 'org-agenda)
  33 (eval-when-compile
  34   (require 'cl)
  35   (require 'calendar))
  36
  37 (defgroup org-habit nil
  38   "Options concerning habit tracking in Org-mode."
  39   :tag "Org Habit"
  40   :group 'org-progress)
  41
  42 (defcustom org-habit-graph-column 40
  43   "The absolute column at which to insert habit consistency graphs.
  44 Note that consistency graphs will overwrite anything else in the buffer."
  45   :group 'org-habit
  46   :type 'integer)
  47
  48 (defcustom org-habit-preceding-days 21
  49   "Number of days before today to appear in consistency graphs."
  50   :group 'org-habit
  51   :type 'integer)
  52
  53 (defcustom org-habit-following-days 7
  54   "Number of days after today to appear in consistency graphs."
  55   :group 'org-habit
  56   :type 'integer)
  57
  58 (defcustom org-habit-show-habits t
  59   "If non-nil, show habits in agenda buffers."
  60   :group 'org-habit
  61   :type 'boolean)
  62
  63 (defcustom org-habit-show-habits-only-for-today t
  64   "If non-nil, only show habits on today's agenda, and not for future days.
  65 Note that even when shown for future days, the graph is always
  66 relative to the current effective date."
  67   :group 'org-habit
  68   :type 'boolean)
  69
  70 (defface org-habit-clear-face
  71   '((((background light)) (:background "slateblue"))
  72     (((background dark)) (:background "blue")))
  73   "Face for days on which a task shouldn't be done yet."
  74   :group 'org-habit
  75   :group 'org-faces)
  76 (defface org-habit-clear-future-face
  77   '((((background light)) (:background "powderblue"))
  78     (((background dark)) (:background "midnightblue")))
  79   "Face for future days on which a task shouldn't be done yet."
  80   :group 'org-habit
  81   :group 'org-faces)
  82
  83 (defface org-habit-ready-face
  84   '((((background light)) (:background "green"))
  85     (((background dark)) (:background "forestgreen")))
  86   "Face for days on which a task should start to be done."
  87   :group 'org-habit
  88   :group 'org-faces)
  89 (defface org-habit-ready-future-face
  90   '((((background light)) (:background "palegreen"))
  91     (((background dark)) (:background "darkgreen")))
  92   "Face for days on which a task should start to be done."
  93   :group 'org-habit
  94   :group 'org-faces)
  95
  96 (defface org-habit-alert-face
  97   '((((background light)) (:background "yellow"))
  98     (((background dark)) (:background "gold")))
  99   "Face for days on which a task is due."
 100   :group 'org-habit
 101   :group 'org-faces)
 102 (defface org-habit-alert-future-face
 103   '((((background light)) (:background "palegoldenrod"))
 104     (((background dark)) (:background "darkgoldenrod")))
 105   "Face for days on which a task is due."
 106   :group 'org-habit
 107   :group 'org-faces)
 108
 109 (defface org-habit-overdue-face
 110   '((((background light)) (:background "red"))
 111     (((background dark)) (:background "firebrick")))
 112   "Face for days on which a task is overdue."
 113   :group 'org-habit
 114   :group 'org-faces)
 115 (defface org-habit-overdue-future-face
 116   '((((background light)) (:background "mistyrose"))
 117     (((background dark)) (:background "darkred")))
 118   "Face for days on which a task is overdue."
 119   :group 'org-habit
 120   :group 'org-faces)
 121
 122 (defun org-habit-duration-to-days (ts)
 123   (if (string-match "\\([0-9]+\\)\\([dwmy]\\)" ts)
 124       ;; lead time is specified.
 125       (floor (* (string-to-number (match-string 1 ts))
 126                 (cdr (assoc (match-string 2 ts)
 127                             '(("d" . 1)    ("w" . 7)
 128                               ("m" . 30.4) ("y" . 365.25))))))
 129     (error "Invalid duration string: %s" ts)))
 130
 131 (defun org-is-habit-p (&optional pom)
 132   (string= "habit" (org-entry-get (or pom (point)) "STYLE")))
 133
 134 (defun org-habit-parse-todo (&optional pom)
 135   "Parse the TODO surrounding point for its habit-related data.
 136 Returns a list with the following elements:
 137
 138   0: Scheduled date for the habit (may be in the past)
 139   1: \".+\"-style repeater for the schedule, in days
 140   2: Optional deadline (nil if not present)
 141   3: If deadline, the repeater for the deadline, otherwise nil
 142   4: A list of all the past dates this todo was mark closed
 143
 144 This list represents a \"habit\" for the rest of this module."
 145   (save-excursion
 146     (if pom (goto-char pom))
 147     (assert (org-is-habit-p (point)))
 148     (let* ((scheduled (org-get-scheduled-time (point)))
 149            (scheduled-repeat (org-get-repeat org-scheduled-string))
 150            (sr-days (org-habit-duration-to-days scheduled-repeat))
 151            (end (org-entry-end-position))
 152            closed-dates deadline dr-days)
 153       (if scheduled
 154           (setq scheduled (time-to-days scheduled))
 155         (error "Habit has no scheduled date"))
 156       (unless scheduled-repeat
 157         (error "Habit has no scheduled repeat period"))
 158       (unless (> sr-days 0)
 159         (error "Habit's scheduled repeat period is less than 1d"))
 160       (when (string-match "/\\([0-9]+[dwmy]\\)" scheduled-repeat)
 161         (setq dr-days (org-habit-duration-to-days
 162                        (match-string-no-properties 1 scheduled-repeat)))
 163         (if (<= dr-days sr-days)
 164             (error "Habit's deadline repeat period is less than or equal to scheduled"))
 165         (setq deadline (+ scheduled (- dr-days sr-days))))
 166       (org-back-to-heading t)
 167       (while (re-search-forward "- State \"DONE\".*\\[\\([^]]+\\)\\]" end t)
 168         (push (time-to-days
 169                (org-time-string-to-time (match-string-no-properties 1)))
 170               closed-dates))
 171       (list scheduled sr-days deadline dr-days closed-dates))))
 172
 173 (defsubst org-habit-scheduled (habit)
 174   (nth 0 habit))
 175 (defsubst org-habit-scheduled-repeat (habit)
 176   (nth 1 habit))
 177 (defsubst org-habit-deadline (habit)
 178   (let ((deadline (nth 2 habit)))
 179     (or deadline
 180         (+ (org-habit-scheduled habit)
 181            (1- (org-habit-scheduled-repeat habit))))))
 182 (defsubst org-habit-deadline-repeat (habit)
 183   (or (nth 3 habit)
 184       (org-habit-scheduled-repeat habit)))
 185 (defsubst org-habit-done-dates (habit)
 186   (nth 4 habit))
 187
 188 (defsubst org-habit-get-priority (habit &optional moment)
 189   "Determine the relative priority of a habit.
 190 This must take into account not just urgency, but consistency as well."
 191   (let ((pri 1000)
 192         (now (time-to-days
 193               (or moment
 194                   (time-subtract (current-time)
 195                                  (list 0 (* 3600 org-extend-today-until) 0)))))
 196         (scheduled (org-habit-scheduled habit))
 197         (deadline (org-habit-deadline habit)))
 198     ;; add 10 for every day past the scheduled date, and subtract for every
 199     ;; day before it
 200     (setq pri (+ pri (* (- now scheduled) 10)))
 201     ;; add 50 if the deadline is today
 202     (if (and (/= scheduled deadline)
 203              (= now deadline))
 204         (setq pri (+ pri 50)))
 205     ;; add 100 for every day beyond the deadline date, and subtract 10 for
 206     ;; every day before it
 207     (let ((slip (- now (1- deadline))))
 208       (if (> slip 0)
 209           (setq pri (+ pri (* slip 100)))
 210         (setq pri (+ pri (* slip 10)))))
 211     pri))
 212
 213 (defun org-habit-get-faces (habit &optional now-days scheduled-days donep)
 214   "Return faces for HABIT relative to NOW-DAYS and SCHEDULED-DAYS.
 215 NOW-DAYS defaults to the current time's days-past-the-epoch if nil.
 216 SCHEDULED-DAYS defaults to the habit's actual scheduled days if nil.
 217
 218 Habits are assigned colors on the following basis:
 219   Blue      Task is before the scheduled date.
 220   Green     Task is on or after scheduled date, but before the
 221             end of the schedule's repeat period.
 222   Yellow    If the task has a deadline, then it is after schedule's
 223             repeat period, but before the deadline.
 224   Orange    The task has reached the deadline day, or if there is
 225             no deadline, the end of the schedule's repeat period.
 226   Red       The task has gone beyond the deadline day or the
 227             schedule's repeat period."
 228   (let* ((scheduled (or scheduled-days (org-habit-scheduled habit)))
 229          (s-repeat (org-habit-scheduled-repeat habit))
 230          (scheduled-end (+ scheduled (1- s-repeat)))
 231          (d-repeat (org-habit-deadline-repeat habit))
 232          (deadline (if scheduled-days
 233                        (+ scheduled-days (- d-repeat s-repeat))
 234                      (org-habit-deadline habit)))
 235          (m-days (or now-days (time-to-days (current-time)))))
 236     (cond
 237      ((< m-days scheduled)
 238       '(org-habit-clear-face . org-habit-clear-future-face))
 239      ((< m-days deadline)
 240       '(org-habit-ready-face . org-habit-ready-future-face))
 241      ((= m-days deadline)
 242       (if donep
 243           '(org-habit-ready-face . org-habit-ready-future-face)
 244         '(org-habit-alert-face . org-habit-alert-future-face)))
 245      (t
 246       '(org-habit-overdue-face . org-habit-overdue-future-face)))))
 247
 248 (defun org-habit-build-graph (habit starting current ending)
 249   "Build a graph for the given HABIT, from STARTING to ENDING.
 250 CURRENT gives the current time between STARTING and ENDING, for
 251 the purpose of drawing the graph.  It need not be the actual
 252 current time."
 253   (let* ((done-dates (sort (org-habit-done-dates habit) '<))
 254          (scheduled (org-habit-scheduled habit))
 255          (s-repeat (org-habit-scheduled-repeat habit))
 256          (start (time-to-days starting))
 257          (now (time-to-days current))
 258          (end (time-to-days ending))
 259          (graph (make-string (1+ (- end start)) ?\ ))
 260          (index 0)
 261          last-done-date)
 262     (while (and done-dates (< (car done-dates) start))
 263       (setq last-done-date (car done-dates)
 264             done-dates (cdr done-dates)))
 265     (while (< start end)
 266       (let* ((in-the-past-p (< start now))
 267              (todayp (= start now))
 268              (donep (and done-dates
 269                          (= start (car done-dates))))
 270              (faces (if (and in-the-past-p
 271                              (not last-done-date)
 272                              (not (< scheduled now)))
 273                         '(org-habit-clear-face . org-habit-clear-future-face)
 274                       (org-habit-get-faces
 275                        habit start (and in-the-past-p
 276                                         (if last-done-date
 277                                             (+ last-done-date s-repeat)
 278                                           scheduled))
 279                        donep)))
 280              markedp face)
 281         (if donep
 282             (progn
 283               (aset graph index ?*)
 284               (setq markedp t)
 285               (while (and done-dates
 286                           (= start (car done-dates)))
 287                 (setq last-done-date (car done-dates)
 288                       done-dates (cdr done-dates))))
 289           (if todayp
 290               (aset graph index ?!)))
 291         (setq face (if (or in-the-past-p todayp)
 292                        (car faces)
 293                      (cdr faces)))
 294         (if (and in-the-past-p
 295                  (not (eq face 'org-habit-overdue-face))
 296                  (not markedp))
 297             (setq face (cdr faces)))
 298         (put-text-property index (1+ index) 'face face graph))
 299       (setq start (1+ start)
 300             index (1+ index)))
 301     graph))
 302
 303 (defun org-habit-insert-consistency-graphs (&optional line)
 304   "Insert consistency graph for any habitual tasks."
 305   (let ((inhibit-read-only t) l c
 306         (moment (time-subtract (current-time)
 307                                (list 0 (* 3600 org-extend-today-until) 0))))
 308     (save-excursion
 309       (goto-char (if line (point-at-bol) (point-min)))
 310       (while (not (eobp))
 311         (let ((habit (get-text-property (point) 'org-habit-p)))
 312           (when habit
 313             (move-to-column org-habit-graph-column t)
 314             (delete-char (min (+ 1 org-habit-preceding-days
 315                                  org-habit-following-days)
 316                               (- (line-end-position) (point))))
 317             (insert (org-habit-build-graph
 318                      habit
 319                      (time-subtract moment
 320                                     (days-to-time org-habit-preceding-days))
 321                      moment
 322                      (time-add moment
 323                                (days-to-time org-habit-following-days))))))
 324         (forward-line)))))
 325
 326 (defun org-habit-toggle-habits ()
 327   "Toggle display of habits in an agenda buffer."
 328   (interactive)
 329   (org-agenda-check-type t 'agenda)
 330   (setq org-habit-show-habits (not org-habit-show-habits))
 331   (org-agenda-redo)
 332   (org-agenda-set-mode-name)
 333   (message "Habits turned %s"
 334            (if org-habit-show-habits "on" "off")))
 335
 336 (org-defkey org-agenda-mode-map "K" 'org-habit-toggle-habits)
 337
 338 (provide 'org-habit)
 339
 340 ;; arch-tag:
 341
 342 ;;; org-habit.el ends here